This vulnerability allows remote attackers to execute arbitrary code on affected installations of OpenText Brava! Desktop 16.6.3.84. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of DWF files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-12745.
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Analysis
by VulDB Data Team • 06/18/2021
CVE-2021-31499 represents a critical buffer overflow vulnerability affecting OpenText Brava Desktop application. Attackers can manipulate the memory layout to redirect execution flow to their malicious payload, effectively gaining remote code execution capabilities. The impact extends beyond simple code execution as this vulnerability can be used for privilege escalation, data exfiltration, and persistent access to affected systems. Organizations using OpenText Brava! Desktop should immediately apply the vendor-provided patches and consider network segmentation to limit exposure. Additionally, implementing application whitelisting policies and user education regarding suspicious file attachments can significantly reduce the attack surface for this vulnerability. The vulnerability demonstrates the importance of robust input validation and memory safety practices in document processing applications, particularly those handling complex file formats that require extensive parsing logic. Security teams should monitor for exploitation attempts and consider implementing endpoint detection and response solutions to identify potential exploitation of this and similar buffer overflow vulnerabilities in their environments.